How do the mechanical properties of carbon nanotubes increase? An experimental evaluation and modeling of the engineering tensile strength of individual carbon nanotubes
How do the mechanical properties of carbon nanotubes increase? An experimental evaluation and modeling of the engineering tensile strength of individual carbon nanotubes
复制标题
DOI：
10.1088/2053-1591/ab069f
复制
发表时间：
2019-05-01
影响因子：
2.3
通讯作者：
Hashida, Toshiyuki
中科院分区：
文献类型：
--
作者：
Shirasu, Keiichi;Yamamoto, Go;Hashida, Toshiyuki
为了开发具有上级力学性能的多壁碳纳米管（MWCNTs），建立了MWCNTs抗拉强度的理论模型，并利用本研究单轴拉伸试验获得的实验结果和文献数据研究了MWCNTs的结构-力学性能关系。我们表明，标称拉伸强度是一个重要的设计因素，在确定与碳纳米管（CNT）增强的复合材料的机械性能和标称（工程）拉伸强度被写为产品的断裂强度（有效强度）和断裂截面比，可以计算的断裂截面积除以全横截面积，包括空心芯。基于该模型，控制壳间交联的程度以在纳米管壳中产生干净的断裂而不使断裂强度显著降低对于改善标称拉伸强度是重要的。
To enable the development of multiwalled carbon nanotubes (MWCNTs) with superior mechanical properties, a theoretical model of the tensile strength of MWCNTs is developed, and the structural- mechanical property relationships of MWCNTs are investigated using experimental results obtained by uniaxial tensile tests from this study and data from the literature. We show that the nominal tensile strength is an important design factor in determining the mechanical properties of composites reinforced with carbon nanotubes (CNTs) and that the nominal (engineering) tensile strength is written as a product of the fracture strength (effective strength) and fracture cross-section ratio that can be calculated by the fracture cross-sectional area divided by the full cross-sectional area including the hollow core. Based on this model, controlling the degree of intershell crosslinking to produce clean break fractures in the nanotube shells without a dramatic degradation of the fracture strength is important for improving the nominal tensile strength.